WATERSHED INTRODUCTION - UWSP
Transcript of WATERSHED INTRODUCTION - UWSP
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LakePartnerships
WATERSHED INTRODUCTIONCharlieMarks,GreenLakeSanitaryDistrict
BigGreenLake
Wisconsin’s Major Watersheds
Green Lake WatershedWatershedArea107 square miles
CountyBreakdownGreen Lake = 58%Fond du Lac = 41%Winnebago = 1%
PrimaryTributarySilver Creek 44% watershed area
Green Lake Water Source
Rainfall51%Runoff
41%
Springs8%
Green Lake Landuse
Agricultural, 57%
Developed, 3%
Forest, 9%
Grassland, 10%
Barren, 1%
Open Water, 13%
Wetland, 7%
Green Lake FormationFormationGlacial lakeFormed 10,000 years ago during last Ice Age
SizeandDepth11.5 square miles7 miles x 2 miles25 miles of shoreline
RetentionTime21 years
DeepestnaturalinlandlakeinWisconsin(236ft)
Firstlakeinstatewithprioritywatershedstatus
Federal Agenci
esStateAgenci
es
Sanitary
District
CountyAgenci
esCities
Not-for-
Profits
UW-Extensi
on
Delta Institut
e
Nelson Institut
e for Environmental
Studies
Citizens of the Watershed
Ripon College
Lake Management Planning Team
UW-Madison and –Stevens Point
LEGENDLake Sampling Site
Current Stream Sampling Site
Historic Stream Sampling Site
USGS Lake and Stream Monitoring
Currently monitoring 70% of watershed area 90%coverage in 2018
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1985 1990 1995 2000 2005 2010 2015
Tota
l Pho
spho
rus (
µg/L
)
Year
Green Lake Total PhosphorusEast and West End Average for June-August Profiles
Water quality data collected by USGS, DNR and citizen monitors. Data compiled by USGS.
Surface: Phosphorus Criteria: 15 µg/LStratified 2-story fishery – warm & cold water
MayExceedStandards
Water Quality Trends:Total Phosphorus
Data collected and compiled by USGS.
Nat. Res. Code 102: optimalDissolved Oxygen > 5 mg/LNat. Res. Code 102: optimalDissolved Oxygen > 5 mg/L
Lake surface
Lake bottom
Dissolved Oxygen HypoxiaWest End, 2012 (but similar in other years)
2014DNR classifies Green Lake as
an impaired waterway
Impairment Classification
ImpairmentLow Dissolved Oxygen
PollutantPhosphorus
Green Lake’s Impairment
GREEN LAKE WATERSHED:
16,650 LBS. OF PHOSPHORUS
GREEN LAKE:
8.3 MILLION LBS. OF ALGAE
Phosphorus loading estimate by Paul Baumgart (UW-GB) and Dale Robertson (USGS)
Lake Management Plan for Green Lake
– Approved by the DNR in 2013
– Meeting Schedule• Monthly during planning• Quarterly after approval
– Nine Key Elements• Current updating the plan
to meet the EPA’s more stringent “Nine Key Elements”
Conductingathree‐yearLAKE STUDY focusingonsolutionstoGreenLake’swaterqualitychallenges.1
Green Lake Association
Green Lake Sanitary DistrictSuperior
HydroscienceU.S. Geological
Survey
TargetingNUTRIENT LOADING PRIORITY AREAS inthewatershed.2
Delta InstituteGreen Lake and Fond du Lac County Land
Conservation DepartmentsGreen Lake Association
Green Lake Sanitary
IdentifiedRIPARIAN PRIORITY AREAS inthewatershedtoprioritizestreamandshorelinerestorations.
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RecentlycompletedaSOCIAL SCIENCE SURVEY toensurewehavethemosteffectiveagriculturalconservationprograms.4
Green Lake Association
Green Lake and Fond du Lac Land
Conservation Depts.Green Lake Sanitary
DistrictNatural Resources
Conservation S i
ConductingaCityofGreenLakeSTORMWATER MANAGEMENT PLAN toincreasetheadoptionofurbanconservationpractices.
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City of Green Lake
Green Lake Association
Green Lake Sanitary District
Wisconsin
IMPLEMENTATIONCalebZahn,NaturalResourcesConservationService
+~70%via EQIP
~30%landowner
$50,000 = $35,000 $15,000+
Practices required to be installed for a ~10-20 year lifespan (for structural practices)
The Standard Ag BMP Model
+USDANWQI DNRLake
ProtectionGrants
• Inexchange,bestpracticesareinstalledinperpetuity(75.4% ofprojects)
• Recordedinpropertydeed
• PracticesmaintainedbytheGLSD
0%Landowner
The Green Lake BMP ModelGrantFunding CashContributions TechnicalSupport
Funding Sources of Big Green BMPs
Total funding = $1.8 MM
$1,096,392
$400,000
$284,828
$5,000 $1,537$0
$200,000
$400,000
$600,000
$800,000
$1,000,000
$1,200,000
USDA‐NWQI WDNR Sanitary District Green LakeAssociation
County
Cash Con
tributions
Installed BMPs in the Green Lake Watershed (2012-2017)
$1.8MMTotal dollars for ag BMPs in the Green Lake watershed (2012-2017)
131 Hard and soft BMPs installed or planned in the Green Lake watershed
THE GREEN LAKE WATERSHED STRATEGY (2012-2017)
For entire Big Green Lake watershed
6,260 Estimated pounds of phosphorus diverted from Big Green Lake
3.1MMEstimated pounds of algae prevented from growing in Big Green Lake
THE GREEN LAKE WATERSHED STRATEGY (2012-2017)
56 Landowners willing to install BMPs
For entire Big Green Lake watershed
THE GREEN LAKE WATERSHED STRATEGY (2012-2017)
Practice TreatmentArea*
Cover Crops 200 ac
Grade stabilization structure 2,750 ac
Grassed/lined waterways 4.1 mi
No-till 170 ac
Streambank and shoreline protection 2.7 mi
Terrace 235 ac
Waste storage / leachate 758 ac
*For NWQI area only (not entire Green Lake watershed)
Grade Stabilization Structure + Waterway
31 Gradestabilizationstructures
3,080 Poundsofphosphorussavings
4.4 Milesofwaterways 820 Poundsof
phosphorussavings
Retention Pond and Chute
y Highway A, Green Lake | Bob Wallace
100 truck loads1,500 cubic yards
5yearslater(2015)
Green Lake County Land Conservation Department
Stream Restoration
BEFORE
Stream Restoration
AFTER
3.4 Milesofrestoredstreams
645 Poundsofphosphorussavings
NEXT STEPSCalebZahn,NaturalResourcesConservationService
BMPinstallationfocuswithintheSilverCreekHUC.
N E X T S T E P S
Why Has it Worked?
• Strong partnerships• Good relationships with landowners• History of conservation within watershed• History of water quality monitoring• Diverse funding sources – flexibility and
mobility• Treasured natural resource• A community that cares• Plans for the future
Questions?